期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 114, 期 30, 页码 13118-13125出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp104488b
关键词
-
资金
- National Natural Science Foundation of China [50625208, 20773097, 20877061]
- National Basic Research Program of China [2007CB613302]
Pt/TiO2 nanosheets with exposed (001) facets were fabricated by a simple hydrothermal route in a Ti(OC4H9)(4)-HF-H2O mixed solution followed by a photochemical reduction deposition of Pt nanoparticles on TiO2 nanosheets under xenon lamp irradiation. The prepared samples were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption isotherms, UV-vis diffuse reflectance spectroscopy, and photoluminescence (PL) spectroscopy. Production of (OH)-O-center dot radicals on the TiO2 surface was detected by the PL technique using coumarin as a probe molecule. The effects of Pt loading on the rates of photocatalytic hydrogen production of the as-prepared samples in ethanol aqueous solution were investigated and discussed. The results showed that the photocatalytic hydrogen production rates of TiO2 nanosheets from the ethanol aqueous solutions were significantly enhanced by loaded Pt on the TiO2 nanosheets, and the latter with a 2 wt % of deposited Pt exhibited the highest photocatalytic activity. All fluorinated TiO2 nanosheets exhibited much higher photocatalytic activity than Degussa P25 TiO2 and pure TiO2 nanoparticles prepared in pure water due to the synergistic effect of surface fluorination and exposed (001) facets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据